Function relative

scripts/generate-mappings.js:22–23

(value /* : string */)

const index = packageJson.module;
const relative = (value /* : string */) =>
  path.relative(root, path.resolve(path.dirname(index), value));

const mappings = ast.program.body.reduce((acc, declaration, index, self) => {
  if (types.isExportNamedDeclaration(declaration)) {